TCP/IP Model

Question 1

How many layers are in TCP/IP Model and what are they?

Answer 1

4 layers. Application < Transport < Internet < Network Interface

Question 2

Network Interface Layer

Answer 2

How to transmit bits and what network medium used

Question 3

Internet layer

Answer 3

Data packaged into IP datagram pushed around using routing by a router

This occurs externally from my network to some remote network

Our network connects w the INTRANET

Question 4

Transport layer

Answer 4

Same as OSI

Question 5

Application layer

Answer 5

How program interface w transport by session management

Question 6

FTP (File Transfer)

Answer 6

Ports 20, 21
Usage: Provides insecure file transfer between client and server
No encryption -> insecure

Question 7

SSH (Secure Shell)

Answer 7

Port: 22
Usage: Provides secure remote control of another using a text based environment. Yes encryption -> secure

Best use: remote log in

Question 8

SFTP (Secure File Transfer Protocol)

Answer 8

Port: 22
Tunneling FTP thru SSH
Same but secure

Question 9

Telnet

Answer 9

Port 23
Provides insecure remote control if another machine using a text based environment (no encryption)
Provides bi-directional interactive text communication using virtual terminal connection

Question 10

SMTP (Simple Mail Transfer)

Answer 10

Port 25
Provides the ability to send emails over a network

Question 11

DNS (Domain Name System)

Answer 11

Port 53
Convert domain name to IP address, and vice versa

Question 12

DHCP (Dynamic Host Control)

Answer 12

Port 67, 68
Automatically assign network parameters like IP addresses, subnet mask, default gateway, and DNS server to use

Question 13

TFTP (Trivial FTP)

Answer 13

Port 69
Lightweight file transfer method to send config files or network booting of an OS
Both direction, no authentication/encryption

Question 14

HTTP (Hypertext Transfer)

Answer 14

Port 80
Used for insecure web browsing

Question 15

POP3 (Post Office Protocol v3)

Answer 15

Port 110
Used for receiving incoming emails

Question 16

NTP (Network Time)

Answer 16

Port 123
Keep accurate time for clients in a network (reference clock)

Question 17

NetBIOS (Network Basic I/O System)

Answer 17

Port 139
For file or printer sharing in a window network

Question 18

IMAP (Internet Mail Application)

Answer 18

Port 143
Newer method -> improve POP3 -> to receive mails

Question 19

SNMP (Simple Network Management)

Answer 19

Port 161, 162
Collect data about network devices and monitor their status

Question 20

LDAP (Lightweight Directory Access)

Answer 20

Port 389
Provides directory services to your network (Active Directory)

Question 21

HTTPS (Hyper-text Transfer Secure)

Answer 21

Port 443
Secure web browsing
Work via an encrypted tunnel
- SSL: Secure Socket Layer
- TLS: Transport Layer Security

Question 22

SMB (Sever Message Block)

Answer 22

Port 445
Window file and sharing services
Operates with NetBIOS. While NetBIOS is used to do the authentication, SMB passing out files

Question 23

Syslog (System Logging)

Answer 23

Port 514
Send logging data back to a centralized server

Question 24

SMTP TLS

Answer 24

Port 587
Secure version of SMTP

Question 25

LDAPS

Answer 25

Port 636

Question 26

IMAP over SSL

Answer 26

Port 993

Question 27

POP3 over SSL

Answer 27

Port 995

Question 28

SQL (Structure Query Language)

Answer 28

Port 1433
Communication from a client to the database engine

Question 29

SQLnet

Answer 29

Port 1521
Communication from a client to the MySQL database engine

Question 30

MySQL

Answer 30

Port 3306
Communication from a client to the MySQL database engine

Question 31

RDP (Remote Desktop)

Answer 31

Port 3389
Provides graphical remote control of another client or server

Question 32

SIP (Session Initiation)

Answer 32

Port 5060, 5061
Initiate VOIP and video calls